Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended			3 Months Ended	6 Months Ended				12 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 American University Of Caribbean [Member]	Dec. 31, 2011 Carrington [Member]	Dec. 31, 2011 Carrington [Member]	Dec. 31, 2011 Advanced Academics [Member]	Dec. 31, 2011 Accreditation And Title IV Eligibility [Member]	Dec. 31, 2011 Carrington [Member]	Jun. 30, 2011 Indefinite-Lived Intangible Assets [Member] Carrington [Member] years	Jun. 30, 2011 Reporting Unit [Member] Carrington [Member] years
Intangible Assets [Line Items]
Amortization expense for amortized intangible assets	$ 2,700,000		$ 3,700,000	$ 5,000,000	$ 7,600,000
Indefinite-lived Intangible Assets	251,666,000		177,292,000	251,666,000	177,292,000	117,100,000
Impairment loss associated with recorded goodwill or indefinite-lived intangible assets, as estimated fair values exceeded carrying amount		0								41,200,000
Minimum percentage of estimated fair values of reporting units and indefinite-lived intangible assets exceeding carrying values				15.00%
Term of long-term planning, in years												5	5
Discount rate												14.00%	13.00%
Goodwill, fair value										71,100,000
Goodwill	553,456,000	523,620,000	516,648,000	553,456,000	516,648,000				17,100,000		151,900,000
Amount by which reporting value is less than carrying value							33,800,000	33,800,000		41,200,000
Percentage of revenue declined							27.00%		3.00%
Percentage of excess fair value over carrying value									27.00%
Goodwill and asset impairment charges				75,039,000
Goodwill and other intangibles impairment charges, income tax benefit							19,300,000
Goodwill written down				33,839,000				33,800,000
Increased in indefinite-lived intangible assets				73,500,000
Acquisitions				$ 68,321,000